| Payments for aircraft improvement |  |  | (1,604 | ) |  |  | (6,294 | ) |
| Payments for lessor maintenance obligations |  |  | (65 | ) |  |  | (347 | ) |
| Other |  |  | 362 |  |  |  | (231 | ) |
| Net cash flows (used in) provided by investing activities |  |  | (1,307 | ) |  |  | 126,117 |  |